Thermal Magnetic Circuit Breakers

Thermal magnetic circuit breakers are devices that provide protection against overcurrent in circuits. Circuit breakers use an automatically operated electrical switch to disrupt the flow of current when an overload or short circuit is detected. Thermal magnetic circuit breakers do this using an electromagnet and bimetallic strips. 


Circuit breakers provide more sophisticated protection against overcurrent than a simple fuse. Fuses simply burn out and have to be replaced, whereas circuit breakers just need to be reset.


How do thermal magnetic circuit breakers work?

In thermal magnetic circuit breakers, there are two ways the flow of current might be detected and disrupted. In the event of a short circuit, the electromagnet rapidly trips the switch. If the overload is smaller, over a longer period of time, the bimetallic strips will instead eventually react to trip the switch. 


What are thermal magnetic circuit breakers used for?

Thermal magnetic circuit breakers are most often used in distribution boards. They make up part of the subsidiary circuits in the broader electrical supply system, protecting against overcurrent.


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Omschrijving Prijs Current Rating Number of Poles Range Voltage Rating Width Series Application Break Time Breaking Capacity at Maximum Voltage Rating Circuit Breaker Type Mounting Hole Diameter Mounting Hole Length Mounting Hole Size Mounting Hole Width
RS-stocknr. 175-1495
FabrikantnummerGV4P07N6
296,03 €
Each
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7A 3 TeSys 690V ac 165mm GV4P - - 8 kA @ 660 → 690 V ac - - - - -
Nieuw
RS-stocknr. 210-2084
Fabrikantnummer3120-N551-H7T1-W02D-10A
FabrikantETA
21,03 €
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10A 5 - 50 V DC, 240 V AC 25mm 3120-N - - - - - - - -
RS-stocknr. 774-0058
FabrikantnummerFC6628
6,43 €
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Aantal stuks
8A - - - 14.1mm A-0709 - - - - - - - -
RS-stocknr. 899-1689
Fabrikantnummer2DU40R
FabrikantAltech
20,47 €
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40A 2 - 480Y/277V - R Appliance Circuit, Control Transformers, Power Supplies, Power Supplies and Reactive Loads, Sensitive Electronics, UL1077 Application Time Delay 10 kA MCCB - - - -
RS-stocknr. 175-1538
FabrikantnummerGV4PE25B
237,02 €
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Aantal stuks
25A 3 TeSys 690V ac 116mm GV4PE - - 10 kA @ 500 V ac - - - - -
RS-stocknr. 272-836
FabrikantnummerGV3L40
167,25 €
Each
Aantal stuks
- 3 TeSys 690V ac 55mm GV3 - - 5 kA - - - - -
RS-stocknr. 175-1494
FabrikantnummerGV4P07N
313,38 €
Each
Aantal stuks
7A 3 TeSys 690V ac 165mm GV4P - - 8 kA @ 660 → 690 V ac - - - - -
RS-stocknr. 122-9274
Fabrikantnummer3400-P10-H-SI-1A
FabrikantETA
55,21 €
Each
Aantal stuks
1A 1 - - 14.5mm 3400 - - - - - - - -
RS-stocknr. 899-1670
Fabrikantnummer2DU40L
FabrikantAltech
44,36 €
Each
Aantal stuks
40A 2 - 240V ac - L Heaters and Reactive Loads, High Inrush Motors, Power Supplies, Transformer, UL489 Applications Time Delay 10 kA MCCB - - - -
RS-stocknr. 312-3869
FabrikantnummerGB2DB20
36,73 €
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Aantal stuks
12A 2 - 277 V ac, 415 V ac 30mm GB2 - - 1.5 kA - - - - -
RS-stocknr. 774-0039
FabrikantRS PRO
7,88 €
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Aantal stuks
16A - - - 11mm A-0709 - - - - - - - -
Nieuw
RS-stocknr. 210-2083
Fabrikantnummer3120-N526-P7T1-W01D-8A-A04010811M
FabrikantETA
49,51 €
Each
Aantal stuks
8A 2 - 50 V DC, 240 V AC 36.2mm 3120-N - - - - - - - -
RS-stocknr. 899-4619
Fabrikantnummer3C30UM
FabrikantAltech
46,06 €
Each
Aantal stuks
30A 3 - 480Y/277V - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, Appliances, Business Equipment, Control Circuit Applications, Lighting, Low Inrush Motors, UL508 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
RS-stocknr. 899-1771
Fabrikantnummer2E2UM
FabrikantAltech
30,71 €
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Aantal stuks
2A 2 - - - V-EA AC Discharge Lamps (Ballast), AC General Use, AC Incandescent Lamps (Tungsten), AC Motor Starting, AC Resistance, Across the Line, High Efficiency Motors, UL508 Application, Which have Exceedingly High Inrush Current Time Delay 10 kA MCCB - - - -
RS-stocknr. 175-1537
FabrikantnummerGV4PE12S6
333,82 €
Each
Aantal stuks
12.5A 3 TeSys 690V ac 116mm GV4PE - - 10 kA @ 660 → 690 V ac - - - - -
RS-stocknr. 899-4616
Fabrikantnummer3C30UL
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30A 3 - 480Y/277V - UL Lighting and Control Circuit Applications, Low Inrush Motors, Receptacles, Resistive Load, UL489 Application, Wiring Protection Time Delay 10 kA MCCB - - - -
RS-stocknr. 2509256296
FabrikantnummerW58-XC4C12A-1
FabrikantTE Connectivity
6,71 €
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Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509493997
FabrikantnummerC5A3P
59,60 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509493688
FabrikantnummerC1A1P
19,87 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2508421770
FabrikantnummerTR-11CX632A
FabrikantAltech
4,50 €
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Aantal stuks
- - - - - - - - - - - - - -